Change input type of register from text to email

www/templates/register.html

@@ -2,7 +2,7 @@
     <ion-content has-header="true" has-tabs="true" padding="true">
         <div class="list">
             <label class="item item-input">
-                <input type="text" ng-model="user.email" placeholder="Email">
+                <input type="email" ng-model="user.email" placeholder="Email">
             </label>
             <label class="item item-input">
                 <input type="password" ng-model="user.password" placeholder="Password">